diff options
Diffstat (limited to 'crypto/evp/e_idea.c')
| -rw-r--r-- | crypto/evp/e_idea.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/crypto/evp/e_idea.c b/crypto/evp/e_idea.c new file mode 100644 index 0000000000..c643a063a6 --- /dev/null +++ b/crypto/evp/e_idea.c @@ -0,0 +1,111 @@ +/* crypto/evp/e_idea.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#ifndef NO_IDEA + +#include <stdio.h> +#include "cryptlib.h" +#include <openssl/evp.h> +#include <openssl/objects.h> +#include "evp_locl.h" + +static int idea_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key, + unsigned char *iv,int enc); + +/* NB idea_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a special + * case + */ + +static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, unsigned char *in, unsigned int inl) +{ + BLOCK_CIPHER_ecb_loop() + idea_ecb_encrypt(in + i, out + i, &ctx->c.idea_ks); + return 1; +} + +/* Can't use IMPLEMENT_BLOCK_CIPHER because idea_ecb_encrypt is different */ + +BLOCK_CIPHER_func_cbc(idea, idea, idea_ks) +BLOCK_CIPHER_func_ofb(idea, idea, idea_ks) +BLOCK_CIPHER_func_cfb(idea, idea, idea_ks) + +BLOCK_CIPHER_defs(idea, idea_ks, NID_idea, 8, 16, 8, + 0, idea_init_key, NULL, + EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL) + +static int idea_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key, + unsigned char *iv, int enc) + { + if(!enc) { + if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE) enc = 1; + else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE) enc = 1; + } + if (enc) idea_set_encrypt_key(key,&(ctx->c.idea_ks)); + else + { + IDEA_KEY_SCHEDULE tmp; + + idea_set_encrypt_key(key,&tmp); + idea_set_decrypt_key(&tmp,&(ctx->c.idea_ks)); + memset((unsigned char *)&tmp,0, + sizeof(IDEA_KEY_SCHEDULE)); + } + return 1; + } + +#endif |